Neurological involvement is described in ABD. The central nervous manifestations are parenchymal or non-parenchymal34. The clinical symptoms therefore can be5: • Encephalomyelitis Aseptic meningitis Organic psychiatric disturbances Benign intracranial hypertension.

In a study with 200 patients 162 had parenchymal involvement including brainstem and spinal cord involvement3. Sometimes the lesions were similar to multiple sclerosis. The other 38 patients mostly had raised intracranial pressure due to dural sinus thrombosis.

We found elevated pressure without any abnormality. It is necessary to perform MRI and/or CT scans to visualise parenchymal structures and blood vessels. In this disease the manifestations of symptoms are widespread and neurological manifestation has to be considered as a possible clinical sign.

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